YJ, I remember the thread you are talking about and we were discussing this. No golf ball has top spin, it only has less spin. Try going to a Golfsmith and produce anything but backspin, its impossible. You may get more side spin, i.e. draw or fade. But the ball will never go back over front, only back under front. The clubs loft will not allow it. Its not like tennis where you can impart an upward swing on a shot and roll your wrist over the ball hitting the ball up, but the spin digs it back down.
So for drives more backspin allows for more air time, air having less friction that the ground will let the ball travel more at a higher speed, but into the wind more air time means more time for the wind to impact the ball (which is why in higher wind areas knock downs and low trajectory shots are easy to control). Not much wind and you can still get the benefit of a better carry, imagine 2 exact length drives of 300 yds, one carries 295 and rolls out 5 more, the other carries 265 but rolls out 35, now place a bunker 270yds to 285yds out, you want the carry. Less backspin (moving the dot up) will cut through the air but not climb the air as well producing a flatter trajectory. Mythbusters did an interesting test with golf ball dimples on car, but they did show it in for a golf ball, and the dimples are the reason balls fly further, probably because the dimples allow some friction to the air that will allow it to climb the air.
Only a generous bounce on a down slope or hard as nails fairways will give you the benefit of a better roll (St Andrews). But softer fairways will not yield much roll, and sometimes no roll (Bethpage).